CODEWITHSUNDEEP
javaregex
Tommy Barrett
Tommy Barrett

Reputation: 61

verifying zipcode? do i need regex?

I need to verify that String zip is 5 numbers long and starts with 80, 81, 82, or 83. do I need a regex to do this?

I have tried boolean validZip = (zip.length() == 5 && zip.charAt(0) == 8 && zip.charAt(1) >= 0 && zip.charAt(1) <= 3); but 80221 returns false for me.

Upvotes: 1

Views: 52

Answers (2)

Raman Sahasi
Raman Sahasi

Reputation: 31841

Sure, you can use this regex

^8[0123]\d{3}$

And use it in java like this

String zipcode = "80882";
Pattern p = Pattern.compile("^8[0123]\\d{3}$");
Matcher m = p.matcher(zipcode);
boolean validZip = m.find();

Upvotes: 2

Kaushal28
Kaushal28

Reputation: 5557

Try this:

boolean validZip = (zip.length() == 5 && zip.charAt(0) == '8' && zip.charAt(1) >= '0' && zip.charAt(1) <= '3');

You were comparing ASCII values. To compare characters, you need to write them in single quote. If you want to compare ASCII values, then it can be done as following:

boolean validZip = (zip.length() == 5 && zip.charAt(0) == 56 && zip.charAt(1) >= 48 && zip.charAt(1) <= 51);

ASCII values for 0-9 ranges from 48-57.

Upvotes: 4

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